from __future__ import annotations

import re

import httpx

from ariadne.services.mailu import MailuService
from ariadne.utils.errors import safe_error_detail
from ariadne.utils.http import extract_bearer_token
from ariadne.utils.name_generator import NameGenerator
from ariadne.utils.passwords import random_password


class DummyRequest:
    def __init__(self, headers):
        self.headers = headers


def test_random_password_length() -> None:
    password = random_password(24)
    assert len(password) == 24
    assert re.match(r"^[A-Za-z0-9]+$", password)


def test_mailu_resolve_email_attribute() -> None:
    attrs = {"mailu_email": ["custom@bstein.dev"]}
    assert MailuService.resolve_mailu_email("alice", attrs) == "custom@bstein.dev"


def test_mailu_resolve_email_string() -> None:
    attrs = {"mailu_email": "custom@bstein.dev"}
    assert MailuService.resolve_mailu_email("alice", attrs) == "custom@bstein.dev"


def test_mailu_resolve_email_default() -> None:
    assert MailuService.resolve_mailu_email("alice", {}) == "alice@bstein.dev"


def test_mailu_resolve_email_fallback() -> None:
    assert (
        MailuService.resolve_mailu_email("alice", {}, "alice@bstein.dev")
        == "alice@bstein.dev"
    )


def test_safe_error_detail_runtime() -> None:
    assert safe_error_detail(RuntimeError("boom"), "fallback") == "boom"


def test_safe_error_detail_http_status_json() -> None:
    request = httpx.Request("GET", "https://example.com")
    response = httpx.Response(400, json={"errorMessage": "bad things"}, request=request)
    exc = httpx.HTTPStatusError("bad", request=request, response=response)

    detail = safe_error_detail(exc, "fallback")
    assert "http 400" in detail
    assert "bad things" in detail


def test_safe_error_detail_http_status_text() -> None:
    request = httpx.Request("GET", "https://example.com")
    response = httpx.Response(500, text="bad error", request=request)
    exc = httpx.HTTPStatusError("bad", request=request, response=response)

    detail = safe_error_detail(exc, "fallback")
    assert "http 500" in detail
    assert "bad error" in detail


def test_safe_error_detail_http_status_string() -> None:
    request = httpx.Request("GET", "https://example.com")
    response = httpx.Response(400, json="bad string", request=request)
    exc = httpx.HTTPStatusError("bad", request=request, response=response)

    detail = safe_error_detail(exc, "fallback")
    assert "http 400" in detail
    assert "bad string" in detail


def test_safe_error_detail_timeout() -> None:
    exc = httpx.TimeoutException("timeout")
    assert safe_error_detail(exc, "fallback") == "timeout"


def test_safe_error_detail_runtime_blank_uses_fallback() -> None:
    assert safe_error_detail(RuntimeError("   "), "fallback") == "fallback"


def test_safe_error_detail_http_status_without_body() -> None:
    request = httpx.Request("GET", "https://example.com")
    response = httpx.Response(403, request=request)
    exc = httpx.HTTPStatusError("bad", request=request, response=response)

    assert safe_error_detail(exc, "fallback") == "http 403"


def test_safe_error_detail_unknown_exception_uses_fallback() -> None:
    assert safe_error_detail(ValueError("boom"), "fallback") == "fallback"


def test_extract_bearer_token() -> None:
    request = DummyRequest({"Authorization": "Bearer token123"})
    assert extract_bearer_token(request) == "token123"


def test_extract_bearer_token_invalid() -> None:
    request = DummyRequest({"Authorization": "Basic abc"})
    assert extract_bearer_token(request) is None


def test_extract_bearer_token_missing_parts() -> None:
    request = DummyRequest({"Authorization": "Bearer"})
    assert extract_bearer_token(request) is None


def test_name_generator_unique_adds_candidate(monkeypatch) -> None:
    generator = NameGenerator(max_attempts=2)
    monkeypatch.setattr(NameGenerator, "generate", lambda self: "atlas-guest")
    existing = {"taken"}

    assert generator.unique(existing) == "atlas-guest"
    assert "atlas-guest" in existing


def test_name_generator_unique_returns_none_after_retries(monkeypatch) -> None:
    generator = NameGenerator(max_attempts=2)
    monkeypatch.setattr(NameGenerator, "generate", lambda self: "taken")
    assert generator.unique({"taken"}) is None


def test_name_generator_generate_normalizes_words(monkeypatch) -> None:
    monkeypatch.setattr("ariadne.utils.name_generator.coolname.generate", lambda words: [" Atlas ", "", "Guest"])
    generator = NameGenerator(words=3)
    assert generator.generate() == "atlas-guest"